Crafting

Usage

Altars are used to enchant items, which turns them into enchanted versions. Right-clicking the Altar with Ambrosium Shards will place them on the Altar. To enchant blocks and/or items, place them on the Altar via right-clicking, and it does not matter if Ambrosium Shards were added first or afterwards.

To remove shards, rightclick the Altar with anything other than possible enchantable blocks or items, and the shards will drop out. It can also repair both vanilla and mod items, although this function has been partially covered by the Anvil as of Minecraft 1.4.2.

Trivia

Altars were called the Enchanter back in The Aether, looked more like an Incubator and had a GUI similar to the overworld Furnace.